CN110052695A - A kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development - Google Patents
A kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development Download PDFInfo
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- CN110052695A CN110052695A CN201910327116.9A CN201910327116A CN110052695A CN 110052695 A CN110052695 A CN 110052695A CN 201910327116 A CN201910327116 A CN 201910327116A CN 110052695 A CN110052695 A CN 110052695A
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- cover board
- graphite paper
- aluminium alloy
- runner
- diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
- B23K20/023—Thermo-compression bonding
- B23K20/026—Thermo-compression bonding with diffusion of soldering material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention relates to a kind of diffusion welding methods of aluminium alloy liquid cooling component internal runner development.Aluminium alloy liquid cooled module includes Al-alloy casing and cover board, specific steps are as follows: 1. on diffusion welding work table, is assembled to the Al-alloy casing and cover board that clean up；2. the outer surface in cover board is paved with graphite paper；3. the aluminium alloy liquid cooled module for completing graphite paper is sent into the vacuum chamber of diffusion soldering equipment, and vacuumize, is diffused welding；4. welding is completed, removal graphite paper can show inner flow passage position in the outer surface of cover board, and wherein white area is runner, and black region is non-runner.The present invention, to the diffusion principle of aluminium alloy cover board, shows the position of runner and non-runner in cover board outer surface using the carbon in graphite paper；It is synchronous with diffusion welding (DW) process in implementation process to carry out, only increase the process for being laid with graphite paper；It is easy to operate, high-efficient, more at low cost than conventional ultrasonic imaging or x-ray imaging.
Description
Technical field
The invention belongs to material welding technology fields, and in particular to a kind of expansion of aluminium alloy liquid cooling component internal runner development
Dissipate welding method.
Background technique
Aluminium alloy liquid cooled module is one of nuclear structure of radar system, is played as the heat dissipation of radar electric device, it is ensured that thunder
It is acted on up to system reliability service.Due to light-weighted demand, aluminium alloy liquid cooling component internal runner is compact, the entity portion between water channel
Bit width is smaller.Meanwhile highdensity blindmate installation hole location, the reality between water channel can be generally designed on aluminium alloy liquid cooled module
On body region.Therefore blindmate hole is apart from the waterway wall distance very limit.Therefore guarantee that not will lead to water channel when blindmate hole machined breaks
Wall is one of the critical issue that aluminium alloy liquid cooled module must control.
The common manufacturing method of aluminium alloy liquid cooled module first is that diffusion welding (DW), i.e., whole by the shell and cover board that machined runner
Body welding fabrication.Since diffusion welding (DW) process needs larger pressure, liquid cooled module can occur centainly to deform after welding, especially for
Larger-size liquid cooled module deforms generally large.In order to guarantee that broken wall phenomenon does not occur for blindmate hole machined, generally requires and welding
After connecing, runner position is shown, provides foundation for following process.Common display mode is that supercritical ultrasonics technology either X is penetrated
Collimation method.Two methods are independent process, need special equipment, and show higher cost, the period is long, seriously affects production
Process.Therefore a kind of inner flow passage position for the solution diffusion welding (DW) liquid cooled module for being badly in need of convenient and efficient method is shown, meets product
Production requirement.
Summary of the invention
Display aluminium alloy liquid cooling component internal runner for convenience, provides position foundation for following process, the present invention mentions
For a kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development.
A kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development, the aluminium alloy liquid cooled module includes aluminium
Alloy shell and cover board, inlet, runner and liquid outlet are offered on Al-alloy casing, are flow path wall between adjacent channels；Tool
Steps are as follows for gymnastics work:
(1) on diffusion welding work table, the assembly to the Al-alloy casing and cover board that clean up is completed；
(2) graphite paper is paved in the outer surface of cover board；The graphite paper with a thickness of 30-100um；
(3) the aluminium alloy liquid cooled module for completing graphite paper is sent into the vacuum chamber of diffusion soldering equipment, and vacuumized, be diffused weldering
It connects；Diffusion technology for welding condition: it is protected when heating rate is 10-20 DEG C/min, welding temperature is 550 DEG C -580 DEG C, welding temperature
Pressure pressure is 4MPa-7MPa, time 30-60min；
(4) welding is completed, and removal graphite paper can show inner flow passage position in the outer surface of cover board, and wherein white area is
Runner, black region are non-runner.
The technical solution further limited is as follows:
In step (1), the cover sheet thickness is less than 8mm, to be made on graphite paper and cover board contact surface using Saint Venant's principle
Pressing force be it is non-uniform, the pressing force in corresponding runner position is less than the pressing force of corresponding non-runner position.
In step (2), if the graphite paper of cover board outer surface is the graphite paper of splicing, the splicing gap between adjoining graphite paper is small
In 0.5mm.
In step (3), in the vacuum chamber of diffusion soldering equipment, diffusion soldering equipment pressure head is pressed in the lid for completing graphite paper in advance
On plate, prevent graphite paper from sliding.
Advantageous effects of the invention embody in the following areas:
1. the present invention utilizes diffusion principle of the carbon in graphite paper to aluminium alloy cover board, while utilizing cover board outer surface pair
Influence of the force difference in the region and corresponding non-flow passage area of answering runner to carbon diffusion effect, it is aobvious in cover board outer surface
The position of runner and non-runner is shown.Cover board outer surface show in the position implementation process of runner and non-runner with diffusion welding (DW)
Journey is synchronous to be carried out, and the process for being laid with graphite paper is only increased.More easy to operate than conventional ultrasonic imaging or x-ray imaging,
It is high-efficient, at low cost.
2, using graphite paper as dispersive medium there are three aspect the reason of: (1) at a temperature of diffusion welding (DW), carbon and aluminium
It does not chemically react, does not form new object phase, on cover board object mutually without influence；(2) the counterdiffusion solubility pole of carbon and aluminium
Small, diffusion rate is low, and display effect is closely the micron thickness rank of lid surface, can be ignored, thus to aluminium alloy lid
The ingredient of plate is without influence；(3) graphite paper is that flexible media can generate between aluminium alloy cover board and graphite paper during heating
It slides, part will not be scratched in sliding process.Flexible media does not influence the transmitting of coverplate stress simultaneously, guarantees that welding surface stress is equal
It is even, do not influence welding effect.
3, compared with conventional diffusion welding (DW), in diffusion welding craft parameter of the invention, 550 DEG C -580 DEG C of welding temperature, than normal
It is high to advise diffusion welding (DW) temperature, to improve diffusion rate of the carbon in graphite paper to aluminum alloy surface, improves runner display effect.It protects
Pressure pressure 4MPa-7MPa, bigger than conventional diffusion welding (DW) pressure, the corresponding region flowed in further expansion cover board outer surface and correspondence are non-
The force difference in region is flowed to, water channel display effect is improved.Meanwhile high pressure guarantees that graphite paper is fitted closely with cover board, mentions
High-aluminium alloy Diffusion Welding effect.
4, graphite is black, and aluminium alloy is near-white, and runner display effect is obvious.
Detailed description of the invention
Fig. 1 is welded part aluminium alloy liquid cooled module explosive view.
Fig. 2 is the top view of the Al-alloy casing with runner.
Fig. 3 is the side view of aluminium alloy liquid cooled module.
Fig. 4 is the schematic diagram that Diffusion Welding back shroud outer surface shows runner state.
Serial number in upper figure: Al-alloy casing 1, inlet 2, runner 3, flow path wall 4, liquid outlet 5, cover board 6, display runner 7,
Show flow path wall 8, graphite paper 9.
Specific embodiment
With reference to the accompanying drawing, the present invention is further described by embodiment.
Embodiment 1
It referring to Fig. 1 and Fig. 2, include Al-alloy casing 1 and cover board 6 by the aluminium alloy liquid cooled module of Diffusion Welding.Al-alloy casing 1
On offer inlet 2, runner 3 and liquid outlet 5, be flow path wall 4 between adjacent channels 3；Cover board 6 with a thickness of 8mm, thus sharp
With Saint Venant's principle, the force difference in cover board the outer surface corresponding region flowed to and corresponding non-flow passage area.
The Diffusion Welding operating procedure of aluminium alloy liquid cooling component internal runner development is as follows:
(1) on diffusion welding work table, the assembly to the Al-alloy casing 1 and cover board 6 that clean up is completed.
(2) referring to Fig. 3, the graphite paper 9 cut is laid on the outer surface of cover board 6, guarantee is paved with entire cover board 6
Outer surface, graphite paper with a thickness of 60um；Splicing gap between adjoining graphite paper 9 is less than 0.5mm.
(3) pressure head for spreading soldering equipment is pressed in advance on the cover board for completing graphite paper, prevents graphite paper from sliding；It will complete
The aluminium alloy liquid cooled module of graphite paper is sent into the vacuum chamber of diffusion soldering equipment, closes the vacuum chamber of diffusion soldering equipment and vacuumizes,
It is diffused welding, diffusion technology for welding condition: pressure maintaining when heating rate is 15 DEG C/min, 570 DEG C of welding temperature, welding temperature
Pressure 6MPa, time 30-60min.
(4) graphite paper 9 is removed after the completion of welding, shows inner flow passage position in the outer surface of cover board 6, wherein white area
Domain is display runner 7, i.e. runner position；Black region is to show flow path wall 8, i.e., non-runner position, referring to fig. 4.
Claims (4)
1. a kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development, the aluminium alloy liquid cooled module include that aluminium closes
Golden shell body and cover board offer inlet, runner and liquid outlet on Al-alloy casing, are flow path wall between adjacent channels；It is special
Sign is that Diffusion Welding operating procedure is as follows:
(1) on diffusion welding work table, the assembly to the Al-alloy casing and cover board that clean up is completed；
(2) graphite paper is paved in the outer surface of cover board；The graphite paper with a thickness of 30-100um；
(3) the aluminium alloy liquid cooled module for completing graphite paper is sent into the vacuum chamber of diffusion soldering equipment, and vacuumized, be diffused weldering
It connects；Diffusion technology for welding condition: it is protected when heating rate is 10-20 DEG C/min, welding temperature is 550 DEG C -580 DEG C, welding temperature
Pressure pressure is 4MPa-7MPa, time 30-60min；
(4) welding is completed, and removal graphite paper can show inner flow passage position in the outer surface of cover board, and wherein white area is
Runner, black region are non-runner.
2. a kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development according to claim 1, feature
Be: in step (1), the thickness of the cover board is less than 8mm.
3. a kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development according to claim 1, feature
Be: in step (2), if the graphite paper of cover board outer surface is the graphite paper of splicing, the splicing gap between adjoining graphite paper is less than
0.5mm。
4. a kind of diffusion welding method of aluminium alloy liquid cooling component internal runner development according to claim 1, feature
Be: in step (3), in the vacuum chamber of diffusion soldering equipment, diffusion soldering equipment pressure head is pressed in the cover board for completing graphite paper in advance
On, prevent graphite paper from sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910327116.9A CN110052695B (en) | 2019-04-23 | 2019-04-23 | Diffusion welding method for developing internal flow channel of aluminum alloy liquid cooling assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910327116.9A CN110052695B (en) | 2019-04-23 | 2019-04-23 | Diffusion welding method for developing internal flow channel of aluminum alloy liquid cooling assembly |
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| CN110052695A true CN110052695A (en) | 2019-07-26 |
| CN110052695B CN110052695B (en) | 2020-11-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043063A (en) * | 2021-12-10 | 2022-02-15 | 河北宇天材料科技有限公司 | Aluminum-lithium alloy diffusion welding method |
| CN114406511A (en) * | 2022-03-01 | 2022-04-29 | 镇江海姆霍兹传热传动系统有限公司 | Welding method of electric heating device cavity assembly |
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| CN208419316U (en) * | 2018-07-11 | 2019-01-22 | 苏州库宁换热系统科技有限公司 | A kind of water-cooled plate |
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| DE102009022522A1 (en) * | 2009-05-25 | 2010-12-02 | Karlsruher Institut für Technologie | Assembly with channel-forming internal web structure, comprises two metallic plates on which a web structure is present and which are formed against the web structure in mirror-image like manner, and an edge area |
| CN106102419A (en) * | 2016-07-29 | 2016-11-09 | 中航光电科技股份有限公司 | A kind of liquid cold plate and manufacture method thereof |
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| CN114043063A (en) * | 2021-12-10 | 2022-02-15 | 河北宇天材料科技有限公司 | Aluminum-lithium alloy diffusion welding method |
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| CN110052695B (en) | 2020-11-20 |
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